/*
 * Copyright (c) 2023 Particle Industries, Inc.  All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include <cstdint>

#include "rtc_hal.h"

#include "system_error.h"

namespace particle {

/**
 * Get the number of milliseconds elapsed since the Unix epoch.
 *
 * @return Number of milliseconds on success, otherwise an error code defined by `system_error_t`.
 */
inline int64_t getMillisSinceEpoch() {
    if (!hal_rtc_time_is_valid(nullptr)) {
        return SYSTEM_ERROR_HAL_RTC_INVALID_TIME;
    }
    timeval tv = {};
    int r = hal_rtc_get_time(&tv, nullptr);
    if (r < 0) {
        return r;
    }
    return tv.tv_sec * 1000ll + tv.tv_usec / 1000;
}

} // namespace particle
